How a Bank Builds a Climate Transition Plan
Eight steps, nine to fifteen months from a reasonable base. The financed emissions baseline is the schedule, and most programmes underestimate it.
A climate transition plan for a bank is a substantial programme, not a document exercise. Done properly from a reasonable starting base, it takes nine to fifteen months.
The single most useful thing to understand before starting is which part sets the schedule, because it is not the part most programmes plan around.
The eight steps
| Step | What it does | Duration |
|---|---|---|
| 1 | Scoping. Boundaries, entities, asset classes, who the plan is for | 1 to 2 weeks |
| 2 | Maturity diagnostic. Where the institution actually is | 3 to 4 weeks |
| 3 | GHG baseline and financed emissions. The measurement | 3 to 9 months |
| 4 | Risk and opportunity assessment. Physical and transition risk across the portfolio | 4 to 6 weeks |
| 5 | Ambition and targets. What the bank commits to | 4 to 6 weeks |
| 6 | Implementation roadmap. Actions, owners, sequencing | 3 to 4 weeks |
| 7 | Drafting and board approval. The document and the governance | 4 to 6 weeks |
| 8 | Re-diagnostic and monitoring. Evidence of movement, and what happens next | 2 to 3 weeks |
Step 3 is the schedule
Look at the durations. Every step is measured in weeks except one, which is measured in months and can run to three quarters of a year.
The financed emissions baseline is the programme. Operational emissions for a bank are comparatively trivial: buildings, travel, a fleet. Financed emissions are the real footprint, they depend on counterparty data the bank mostly does not hold in usable form, and assembling that data is slow work that cannot be shortcut by adding people.
Two consequences follow.
Start step 3 first, not in sequence. Scoping and the maturity diagnostic take five to six weeks between them. There is no reason for the baseline work not to begin during them.
Steps 3 and 4 run in parallel. The risk and opportunity assessment does not need a finished baseline. This is the main legitimate opportunity to compress the timetable, and programmes that run them sequentially add months for no reason.
What each step actually produces
Scoping settles the boundary and, critically, who the plan is for. A plan for a development finance lender, a prudential regulator and an index are not the same document. This is also where you establish that IFRS S2 does not itself require a transition plan, so the real driver has to be named.
The maturity diagnostic establishes the honest starting position across governance, data, risk management, targets and disclosure. Use a published rubric rather than inventing one. Build it to be repeatable, because step 8 reuses it to evidence movement, and a diagnostic that cannot be rerun consistently proves nothing.
The baseline is operational emissions plus financed emissions to the PCAF methodology. Expect the first output to look worse than the sustainability team hoped, because PCAF’s data quality scoring is designed to expose estimation rather than conceal it. That is the system working correctly.
Risk and opportunity assessment covers physical and transition risk across the portfolio. For institutions with existing credit risk modelling capability this is the most natural step, because the analytical machinery already exists and is being pointed at a new question.
Ambition and targets is where SBTi enters if the bank is going that route. The choices there are consequential and worth settling before committing: see the December 2026 FINZ deadline and what FINZ asks on fossil fuel finance.
The implementation roadmap is the least differentiated step and the one most often over-engineered. Actions, owners, dates, dependencies. It does not need to be clever.
Drafting and board approval. Approval is a step, not a formality. The part that carries weight is adoption into the risk appetite framework, because that is what turns a published document into something that constrains decisions.
Re-diagnostic and monitoring reruns the maturity assessment, evidences movement, and defines the next cycle.
Where plans fail
Three failure modes, in order of frequency.
Starting the baseline late. Covered above. It is the single most common scheduling error.
Writing the plan for nobody. If the driver was never named at step 1, the document has no test of adequacy and tends to be judged on presentation.
Stopping at publication. A plan that never reaches the risk appetite framework changes no decisions. Step 7’s adoption element is what distinguishes a plan from a brochure.
Framework note
Build to the IFRS Foundation guidance of 23 June 2025, which is the current authority. Take sector detail from the TPT Banks Sector Guidance, April 2024. Use GFANZ material for worked examples and financing levers, remembering that GFANZ restructured in January 2025. The frameworks are structurally compatible, so this is not a difficult choice. See who owns transition plan guidance now.
How ESGweise helps
We run transition planning as a single programme rather than a series of disconnected exercises, with the financed emissions baseline started first because it is the schedule. See our ESG strategy, sustainability reporting and assurance services, and our banking and financial services practice.
To scope a transition plan against your own data position, talk to us.
Related guides
- Who owns transition plan guidance now: TPT, IFRS and GFANZ
- IFRS S2 does not require you to have a transition plan
- Is a transition plan actually required in Jordan or the GCC?
- SBTi FINZ: the December 2026 deadline facing banks
- Financed emissions and PCAF: a bank’s biggest footprint
- Climate transition planning for GCC banks
Frequently asked questions
How long does a bank transition plan take?
Nine to fifteen months is realistic for a bank starting from a reasonable base, meaning some existing climate risk work and reasonable data availability. A bank starting from nothing, or with poor counterparty data, should expect the longer end. The financed emissions baseline is the determining factor.
What is the longest part of the process?
The greenhouse gas baseline and financed emissions work, typically three to nine months. Operational emissions are straightforward. Financed emissions depend on counterparty data that most banks do not hold in usable form, and assembling it is the bottleneck for the whole programme.
Can any of the steps run in parallel?
Yes. The baseline work and the risk and opportunity assessment run in parallel, which is the main opportunity to compress the timetable. Most of the rest is genuinely sequential, because targets depend on the baseline and the roadmap depends on the targets.
Do we need a maturity assessment before starting?
It is worth doing. A maturity diagnostic establishes where the institution actually is across governance, data, risk, targets and disclosure, which determines scope and cost. It is also reused at the end of the programme to evidence movement, so building it to be repeatable is worthwhile. Publicly available rubrics exist for banks and are a better starting point than an internal invention.